/* 云 */
@keyframes cloud_animation {
    0% {
        left: 100vw;
    }

    100% {
        left: -.8rem;
    }
}

.cloud_div {
    position: fixed;
    left: 0;
    right: 0;
    top: .4rem;
    .cloud_icon1 {
        width: .69rem;
        position: absolute;
        left: 100vw;
        top: .6rem;
        animation: cloud_animation 40s ease 10s infinite normal;
    }
    .cloud_icon2 {
        width: .99rem;
        position: absolute;
        left: 100vw;
        top: .3rem;
        animation: cloud_animation 50s ease infinite normal;
    }
    img{
        width: 100%;
    }
}